// convert all characters to lowercase to simplify testing
    var agt=navigator.userAgent.toLowerCase();

    // *** BROWSER VERSION ***
    // Note: On IE5, these return 4, so use is_ie5up to detect IE5.
    var is_major = parseInt(navigator.appVersion);
    var is_minor = parseFloat(navigator.appVersion);

    // Note: Opera and WebTV spoof Navigator.  We do strict client detection.
    // If you want to allow spoofing, take out the tests for opera and webtv.
    var is_nav  = ((agt.indexOf('mozilla')!=-1) && (agt.indexOf('spoofer')==-1)
                && (agt.indexOf('compatible') == -1) && (agt.indexOf('opera')==-1)
                && (agt.indexOf('webtv')==-1) && (agt.indexOf('hotjava')==-1));
    var is_ie     = ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1));
function showForm(setWidth,setHeight,windowName,URL){    		
	var w = window.screen.availWidth;
    var h = window.screen.availHeight;
    var leftPos = (w-setWidth)/2, topPos = ((h-setHeight)/2)-50; setHeight += 50;
    eval("window.open('"+ URL + "','" + windowName + "', 'toolbar=0,scrollbars=1,location=0,statusbar=1,menubar=0,resizable=0,width="+ setWidth +",height="+ setHeight +",left = "+ leftPos +",top = "+topPos +"');");
}